<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<%@ page language="java" contentType="text/html; charset=utf-8"%>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>???????</title>
</head>
<body>
<h1>pageContext:<%=pageContext.getAttribute("msg")%></h1>
<h1>request:<%=request.getAttribute("msg")%></h1>
<h1>session:<%=session.getAttribute("msg")%></h1>
<h1>application:<%=application.getAttribute("msg")%></h1>
</body>
</html>